Assertion :The presence of methanogens can be detected with the help of a fluorescence microscope. Reason: Methanogens contain a coenzyme $(C o F_{420})$ , which fluorescence under U.V. light.

Both Assertion and Reason are correct and Reason is the correct explanation for Assertion

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Both Assertion and Reason are correct but Reason is not the correct explanation for Assertion

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Assertion is correct but Reason is incorrect

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Both Assertion and Reason are incorrect

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Solution

The correct option is A Both Assertion and Reason are correct and Reason is the correct explanation for Assertion
Methanogenic bacteria can be identified by fluorescence microscopy. Methanogens contain a high concentration of the electron carrier cofactor $F_{420}$ that fluoresce on illumination by light of 420nm wavelength. So, the correct option is 'Both Assertion and Reason are correct and Reason is the correct explanation for Assertion'.

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Assertion :The presence of methanogens can be detected with the help of a fluorescence microscope. Reason: Methanogens contain a coenzyme (CoF420), which fluorescence under U.V. light.

Assertion :The presence of methanogens can be detected with the help of a fluorescence microscope. Reason: Methanogens contain a coenzyme $(C o F_{420})$ , which fluorescence under U.V. light.